/Engine/Source/Runtime/Engine/Classes/Components/SceneComponent.h
Set the rotation of the component relative to its parent and force RelativeRotation to be equal to new rotation. This allows us to set and save Rotators with angles out side the normalized range, Note that doing so may break the RotatorCache so use with care.
void SetRelativeRotationExact ( FRotator NewRotation, bool bSweep, [FHitResult](API\Runtime\Engine\Engine\FHitResult) * OutSweepHitResult, ETeleportType Teleport )